WAV audio files: Spectacled eider March 2020 aerial survey

• Main Authors: Rizzolo, Daniel, Stellrecht, Neesha
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: U.S. Fish and Wildlife Service 2021
• Subjects: biota, environment, eiders, Spectacled Eiders, monitoring, Population and Habitat Evaluation/Projection; Bering Sea
• Online Access: https://dx.doi.org/10.7944/p9a8yg7m; https://ecos.fws.gov/ServCat/Reference/Profile/135584

To determine winter population size and late winter distribution, we conducted an aerial survey of the Bering Sea wintering area of Spectacled Eiders (*Somateria fischeri*). During the aerial survey, the photographer (Timothy Bowman) took oblique photographs of 85 flocks. During the survey, aerial observer David Safine recorded observations on waterfowl encountered during the survey using the RECORD program (created by USFWS Pilot-Biologist Jack Hodges) that links an audio recorder with a GPS unit. Each time the observer makes an audio recording, the program saves the audio file and pairs it with coordinates of the location of the aircraft at the time the audio recording was made. Information included in the audio recording includes the flock identification code. David Safine then compiled these recordings and coordinates into the file "voice_record_flock_summary_DES.csv". Files are in the format .WAV with 24 files total that require 15 MB of storage. Filename format is SEW2****.WAV and run in sequence from SEW20001.WAV to SEW20024.WAV. These WAV files are paired with geographic coordinate files with the same name, but with the file extension .POS. One file can contain multiple recordings (with each recording in the WAV file having an associated coordinate in the companion POS file).